"I bought a 20-amp Seimens GFCI breaker and rewired the box so that the pump is the only thing on this breaker. From that day forward, it has never tripped the breaker again."
Good deal, and you are a VERY LUCKY MAN.
I had my EcoStar 3400VSP on a dedicated Seimens 20amp QF220 GFCI DP Breaker w only the pump on the circuit breaker and home-run wiring in conduit from pump to breaker and then went to a Sq-D w same spec's 20amp Double-pole, GFCI breaker and continue to have problems:
-breaker tripped so many times, the whole pump was replaced after 2 months
-ran for X months and breaker tripped again, the motor locked-up and motor was replaced on second VSP pump
-ran for X months and tripped again and the drive was replaced on the second pump
-tripped again after X months and the pump was moved to another breaker of same class. What was on the breaker where the pump was just moved to was moved to the breaker that had just tripped the pump.. 10-12 days later the breaker that the VSP was now on tripped, so now the second pump, that has already had the motor replaced and the drive replaced, just had another new drive replacement on Dec 15. The previous breaker where the VSP had tripped 2 weeks ago has the heater and blower on it, and it has not tripped.
The good news, the pump has been working fine since yesterday [Dec 15], but the Hayward ColorLogic LED lights will now not sync-up after I have tried re-syncing them over 30 times per the Hayward Troubleshooting Manual. I have re-synched them before the exact same way I tried 20+ times yesterday [Dec 15] and over 15+ times today [Dec 16] to re-synch them again - ZERO success.
Note, the DB 70amp breaker that feeds my pool service panel has never tripped, ever. We have (2) 200amp service panels in our garage and none of the breakers have ever tripped except during Hurricane Ike in 2008. Both of my neighbors [that have Pentair equipment, one on each side of me] have never had any issues w either their electricity or their pumps being pre-placed in over 5 yrs. Like I said, you are a very, very lucky man.
If I had 50 cents for every letter I typed on this subject, I would have paid for my pool 4-5 times over...I'm still looking for a solution. I am very glad you found yours - tstex